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Finding the Third Proportional to 3,180 and 7,800

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Solution

The third proportional to 3,180 and 7,800 is: 19,132.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,180 : 7,800 = 7,800 : x
  2. Step 2: Convert to fraction form
    3,180/7,800 = 7,800/x
  3. Step 3: Cross multiply
    3,180x = 7,800 × 7,800
  4. Step 4: Simplify right side
    3,180x = 60,840,000
  5. Step 5: Solve for x
    x = 60,840,000/3,180
  6. Step 6: Final answer
    x = 19,132.08

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Why These Related Problems?

These problems maintain the same ratio (2.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.